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CMCC Global Ocean Reanalysis System (C-GLORS)

"The CMCC Global Ocean Physical Reanalysis System (C-GLORS) is used to simulate the state of the ocean in the last decades. It consists of a variational data assimilation system (OceanVar), capable of assimilating all in-situ observations along with altimetry data, and a forecast step performed by the ocean model NEMO coupled with the LIM2 sea-ice model."

Key Strengths:

Data are available for a large number of ocean parameters

An extensive validation has been conducted and is freely available

The reanalysis is performed at high resolution (1/4 degree) and spans the last 30 years

Key Limitations:

Expert Developer Guidance

The following was contributed by Dr. Andrea Storto (CMCC, Italy), October, 2014:

"Summary: The CMCC Global Ocean Physical Reanalysis System (C-GLORS) is used at CMCC to simulate the state of the ocean in the last decades. It consists of a variational data assimilation system (OceanVar), capable of assimilating all in-situ observations along with altimetry data, and a forecast step performed by the ocean model NEMO coupled with the LIM2 sea-ice model.

Key Strengths:

-Data dissemination is provided for a very large number of ocean parameters

-An extensive validation has been conducted and is freely available, confirming the good quality of the dataset

-The reanalysis is performed at high resolution (1/4 degree) and spans the last 30 years, covering the entire era of meteorological satellites

C-GLORS provides a 3D picture of the state of the ocean at 1/4 degree resolution for the meteorological satellite era (1982-2012).

It can be used for a wide range of applications, from climate monitoring to ocean dynamics studies, to models validation and comparisons, and downstream application (e.g. fisheries, biogeochemistry, etc.).

While climate signals are generally well reproduced, users should pay attention to the period where changes in observing system are present (mostly when altimetric missions start, October 1992, or when Argo data come in the system, 2001-2004)."##

Acknowledgement of any material taken from this page is appreciated. On behalf of experts who have contributed data, advice, and/or figures, please cite their work as well.

CMCC Global Ocean Reanalysis System (C-GLORS)

"The CMCC Global Ocean Physical Reanalysis System (C-GLORS) is used to simulate the state of the ocean in the last decades. It consists of a variational data assimilation system (OceanVar), capable of assimilating all in-situ observations along with altimetry data, and a forecast step performed by the ocean model NEMO coupled with the LIM2 sea-ice model."

The National Center for Atmospheric Research is sponsored by the National Science Foundation. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the National Science Foundation.